Aspiring models Kendall and Kylie have one of the best coaches in the world to get them ready for shoots — sister Kim!

Having seen Kendall Jenner‘s recent bikini beach spread and Kylie Jenner‘s far more tame Sears commercial, one might wonder how two girls who are barely teenagers are already such amazing models. The answer it seems, sister Kim Kardashian! HollywoodLife.com spoke with Kim EXCLUSIVELY at the Super Saturday Ovarian Cancer Benefit in the Hamptons where she told us, “They ask us so many questions. We just make sure we are there for them anytime they need something answered. For Kendall, she was kind of insecure about her smile. We just had her practice and make sure she got that down right. We always go to their shoots and go behind the scenes to see how it’s going.” Kim as a modeling coach, does it get any better?

CHECK OUT KENDALL’S GORGEOUS BEACH PHOTO SHOOT!

Kim also said about her sisters, “Kendall is really hard working and she’s really passionate about modeling. I’m so proud of her. She’s a super model. She works really hard. Her sister Kylie just did a big Sears commercial and Kendall is modeling Forever 21. We’re really proud of them.”

It must be amazing to be a teen model, but even more amazing to have a supportive sister like Kim!